function post(url,data,call){
	$.ajax({
		type: "post",
		url: url,
		data:data,
		success:call,
		error:function (xhr) {
			console.log(xhr)
		}
	});
}


/**
 * 判断是否为空
 */
function isEmpty(str) {
	if (str == null || str == undefined || str == ''|| str == "" || str.length == 0) {
		return true;
	} else {
		return false;
	}
}